Leadframe structure having moveable sub-frame

Details Leadframe structure having moveable sub-frame Leadframe structure having moveable sub-frame

1997-07-25

1999-07-06

Chaudhuri, Olik

Active solid-state devices (e.g., transistors, solid-state diode

Lead frame

257676, 438123, 438111, H01L 23495

Patent

active

059201134

ABSTRACT:
A leadframe (1) includes a main frame having longitudinal outer rails (4) and a number of sub-frame (8) separated from the main frame by a slit (6) extending around at least part of the perimeter of the sub-frame (8). A plurality of flag portions (2), on which a semiconductor die is to be mounted, extend from the mainframe and a plurality of lead portions (12) extend from the sub-frame (8) towards the flag portions (2). The sub-frame (8) is bent twice in a zig-zag fashion so as to be in a plane parallel to that of the main frame so that the corresponding flag and lead portions overlap without affecting the dimensions of the outer edge portion of the main frame.

REFERENCES:
patent: 4809054 (1989-02-01), Waldner
patent: 5343072 (1994-08-01), Imai et al.

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